2018, Viitanen, T., Koskela, M., Immonen, K., Mäkitalo, M., Jääskeläinen, P. and Takala, J., In Proceedings of the 13th International Conference on Computer Graphics Theory and Applications (GRAPP).
Abstract: Ray tracing is an interesting rendering technique, but remains too slow for real-time applications. There are various algorithmic methods to speed up ray tracing through uneven screen-space sampling, e.g., foveated rendering where sampling is directed by eye tracking. Uneven sampling methods tend to require at least one sample per pixel, limiting their use in real-time rendering. We review recent work on image reconstruction from arbitrarily distributed samples, and argue that these will play major role in the future of real-time ray tracing, allowing a larger fraction of samples to be focused on regions of interest. Potential implementation approaches and challenges are discussed.